Cita APA (7a ed.)

Dietze, O. (1983). Riddles and puzzles. Volk und Wissen.

Cita Chicago Style (17a ed.)

Dietze, Otto. Riddles and Puzzles. Berlin: Volk und Wissen, 1983.

Cita MLA (8a ed.)

Dietze, Otto. Riddles and Puzzles. Volk und Wissen, 1983.