Cita APA (7th ed.)

Federico Guillermo II. (1928). My ancestors (1a. ed.). William Heinemann Ltd.

Cita Chicago (17th ed.)

Federico Guillermo II. My Ancestors. 1a. ed. Londres: William Heinemann Ltd, 1928.

Cita MLA (9th ed.)

Federico Guillermo II. My Ancestors. 1a. ed. William Heinemann Ltd, 1928.