Cita APA (7th ed.)

Petzoldt, P., & Petzoldt, P. (1954). On top of the world: My adventures with my mountain climbing husband (1a. ed.). Collins clear type press.

Cita Chicago (17th ed.)

Petzoldt, Patricia, i Paul Petzoldt. On top of the World: My Adventures with My Mountain Climbing Husband. 1a. ed. Londres: Collins clear type press, 1954.

Cita MLA (9th ed.)

Petzoldt, Patricia, i Paul Petzoldt. On top of the World: My Adventures with My Mountain Climbing Husband. 1a. ed. Collins clear type press, 1954.