APA (7th ed.) Citation

Kassil, L. (1964). Was ist Glück? Kinderbuchverlag.

Chicago Style (17th ed.) Citation

Kassil, Lew. Was Ist Glück? Berlin: Kinderbuchverlag, 1964.

MLA (8th ed.) Citation

Kassil, Lew. Was Ist Glück? Kinderbuchverlag, 1964.

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