Cita APA (7a ed.)

Gaudaen, G., & Křupka, V. (1964). Ex Libris Vaclav Křupka.

Cita Chicago Style (17a ed.)

Gaudaen, Gerard, y Vaclav Křupka. Ex Libris Vaclav Křupka. [S. l, 1964.

Cita MLA (9a ed.)

Gaudaen, Gerard, y Vaclav Křupka. Ex Libris Vaclav Křupka. 1964.