Cita APA (7th ed.)

Greenland, D. (1977). The earth in profile: A physical geography. Confield.

Cita Chicago (17th ed.)

Greenland, David. The Earth in Profile: A Physical Geography. San Francisco: Confield, 1977.

Cita MLA (9th ed.)

Greenland, David. The Earth in Profile: A Physical Geography. Confield, 1977.