Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (8th ed.)

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