Cita APA (7th ed.)
Graves, N., Lidstone , J., & Naish, M. (1987). People and environment: A world perspective. Heinemann.
Cita Chicago (17th ed.)
Graves, Norman, John Lidstone , i Michael Naish. People and Environment: A World Perspective. London: Heinemann, 1987.
Cita MLA (9th ed.)
Graves, Norman, et al. People and Environment: A World Perspective. Heinemann, 1987.
Atenció: Aquestes cites poden no estar 100% correctes.