By W. H. Mcleod.
Lanham, MD: Scarecrow Press, 1995.
This dictionary offers concise definitions covering Sikh religion, history, culture, and important personages. It distinguishes between Hindu and Sikh interpretations of terms. The bibliography makes reference to more advanced readings.
By R.G. Dogra and G.S. Mansukhani.
New Delhi: Vikas Pub. House, 1996.
An excellent introduction to the Sikh religion and society, this encyclopedia presents articles on the major aspects of the Sikh faith, folklore, customs, castes, celebrations, culture, and history. It includes extracts from Sikh holy books and a bibliography of books and articles.
Information on Sikhism, including the origins of the faith, its historical development, and beliefs and practices. Includes a glossary, a guide to saints, a bibliography, and links to other websites.
Translated and edited by W.H. McLeod.
Manchester: Manchester University Press, c1984.
Discusses the sacred books of Sikhism such as the Adi-Granth. Includes map, index, bibliography.
Compiled by P.M. Rai.
New York: Greenwood Press, 1989.
Includes over 1,100 concise entries on books and journal articles about Sikh religion and society published since 1965. Although non-religious and current topics are looked at, the bibliography is strongest in its coverage of religious topics. The extensive author, title, and subject indexes make it easy for students to access the content.
Historical Dictionary of Sikhism.
Sikhism Home Page 
Sikhism and the Sikhs: An Annotated Bibliography.