APA (7th ed.) Citation

NetLibrary, Inc, Patterson, A. G., & Rothschild, D. A. (1994). Index to American reference books annual 1990-1994: A cumulative index to subjects, authors, and titles. Libraries Unlimited.

Chicago Style (17th ed.) Citation

NetLibrary, Inc, Anna Grace Patterson, and D. A. Rothschild. Index to American Reference Books Annual 1990-1994: A Cumulative Index to Subjects, Authors, and Titles. Englewood, Colo.: Libraries Unlimited, 1994.

MLA (9th ed.) Citation

NetLibrary, Inc, et al. Index to American Reference Books Annual 1990-1994: A Cumulative Index to Subjects, Authors, and Titles. Libraries Unlimited, 1994.