Cita APA (7a ed.)

Harrison, P., Harrison, S., & Pearson, M. (1987). The geography of the environment (1. publ., 2. impression.). Arnold-Wheaton.

Cita Chicago Style (17a ed.)

Harrison, Patricia, Steve Harrison, y Mike Pearson. The Geography of the Environment. 1. publ., 2. impression. Leeds: Arnold-Wheaton, 1987.

Cita MLA (9a ed.)

Harrison, Patricia, et al. The Geography of the Environment. 1. publ., 2. impression. Arnold-Wheaton, 1987.