Cita APA (7th ed.)

Friedrich, H. (1971). Hugos "Wostok". Kinderbuchverlag.

Cita Chicago (17th ed.)

Friedrich, Herbert. Hugos "Wostok". Berlin: Kinderbuchverlag, 1971.

Cita MLA (8th ed.)

Friedrich, Herbert. Hugos "Wostok". Kinderbuchverlag, 1971.