APA (7th ed.) Citation

Kunz, E., & Kunz, E. (1971). A continent takes shape. Collins.

Chicago Style (17th ed.) Citation

Kunz, Egon, and Elsie Kunz. A Continent Takes Shape. Sydney ; London: Collins, 1971.

MLA (9th ed.) Citation

Kunz, Egon, and Elsie Kunz. A Continent Takes Shape. Collins, 1971.