Cita APA (7th ed.)

Young, M. L., Kruzas, A. T., Kruzas, A. T., & Young, H. C. (1977). Directory of special libraries and information centers. Gale Research.

Cita Chicago (17th ed.)

Young, Margaret Labash, Anthony T. Kruzas, Anthony T. Kruzas, i Harold Chester Young. Directory of Special Libraries and Information Centers. Detroit: Gale Research, 1977.

Cita MLA (9th ed.)

Young, Margaret Labash, et al. Directory of Special Libraries and Information Centers. Gale Research, 1977.