Cita APA

Milligan, G. C. (1977). The Changing earth: An introduction to geology. Toronto: McGraw-Hill Ryerson.

Citación estilo Chicago

Milligan, George C. The Changing Earth: An Introduction to Geology. Toronto: McGraw-Hill Ryerson, 1977.

Cita MLA

Milligan, George C. The Changing Earth: An Introduction to Geology. Toronto: McGraw-Hill Ryerson, 1977.

Precaución: Estas citas no son 100% exactas.