Cita APA (7a ed.)

Erni, H., & Burckhardt, C. J. (1970). Hans Erni: Carl J. Burckhardt. Rencontre.

Cita Chicago Style (17a ed.)

Erni, Hans, y Carl Jacob Burckhardt. Hans Erni: Carl J. Burckhardt. Genf: Rencontre, 1970.

Cita MLA (8a ed.)

Erni, Hans, y Carl Jacob Burckhardt. Hans Erni: Carl J. Burckhardt. Rencontre, 1970.