Style de citation APA (7e éd.)

Friend, S. (2000). Shaping the earth erosion. Twenty-First Century Books.

Style de citation Chicago (17e éd.)

Friend, Sandra. Shaping the Earth Erosion. Brookfield, Conn.: Twenty-First Century Books, 2000.

Style de citation MLA (9e éd.)

Friend, Sandra. Shaping the Earth Erosion. Twenty-First Century Books, 2000.