Citazione Stile APA (7a Edizione)

Knapp, B., Ross, S. R. J., & MacCrae, D. (1989). Challenge of the human environment (1. publ.). Longman.

Citazione stile Chigago Style (17a edizione)

Knapp, Brian, Simon R. J. Ross, e Duncan MacCrae. Challenge of the Human Environment. 1. publ. Harlow: Longman, 1989.

Citatione MLA (9a ed.)

Knapp, Brian, et al. Challenge of the Human Environment. 1. publ. Longman, 1989.