Cita APA (7a ed.)

Illing, W., & Grune, E. (1957). Start in den Himmel (1.- 8. Tausend.). Wunderlich.

Cita Chicago Style (17a ed.)

Illing, Walter, y Edwin Grune. Start in Den Himmel. 1.- 8. Tausend. Leipzig: Wunderlich, 1957.

Cita MLA (8a ed.)

Illing, Walter, y Edwin Grune. Start in Den Himmel. 1.- 8. Tausend. Wunderlich, 1957.