Lua APA (7ú heag.)

Westheimer, D. (1976). The Olmec head ([1st ed.].). Pyramid Books.

Lua i Stíl Chicago (17ú heag.)

Westheimer, David. The Olmec Head. [1st ed.]. New York: Pyramid Books, 1976.

Lua MLA (9ú heag.)

Westheimer, David. The Olmec Head. [1st ed.]. Pyramid Books, 1976.

Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.