APA (7th ed.) Citation

Botermans, J., & Slocum, J. (1998). Optische Illusionen: Puzzles, Rätsel, Vexierbilder u. magische Quadrate. Hugendubel.

Chicago Style (17th ed.) Citation

Botermans, Jack, and Jerry Slocum. Optische Illusionen: Puzzles, Rätsel, Vexierbilder U. Magische Quadrate. München: Hugendubel, 1998.

MLA (8th ed.) Citation

Botermans, Jack, and Jerry Slocum. Optische Illusionen: Puzzles, Rätsel, Vexierbilder U. Magische Quadrate. Hugendubel, 1998.

Warning: These citations may not always be 100% accurate.