Cita APA (7th ed.)

Robinson, R., & Jackson, I. J. (1984). People on earth: Human geography. Longman.

Cita Chicago (17th ed.)

Robinson, Roger, i I. J. Jackson. People on Earth: Human Geography. Harlow, Essex, England: Longman, 1984.

Cita MLA (9th ed.)

Robinson, Roger, i I. J. Jackson. People on Earth: Human Geography. Longman, 1984.