Cita APA (7a ed.)

Harvey, N. (1983). Agricultural research centres: A world directory of organizations and programmes (7th ed.). Longman.

Cita Chicago Style (17a ed.)

Harvey, Nigel. Agricultural Research Centres: A World Directory of Organizations and Programmes. 7th ed. Harlow, Essex, UK: Longman, 1983.

Cita MLA (9a ed.)

Harvey, Nigel. Agricultural Research Centres: A World Directory of Organizations and Programmes. 7th ed. Longman, 1983.