APA (7th ed.) Citation

Preller, L., & Robert, C. (1923). Griechische Mythologie Griechische Mythologie.

Chicago Style (17th ed.) Citation

Preller, Ludwig, and Carl Robert. "Griechische Mythologie." Griechische Mythologie 1923.

MLA (8th ed.) Citation

Preller, Ludwig, and Carl Robert. "Griechische Mythologie." Griechische Mythologie, 1923.

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