Cita APA (7th ed.)

Elton, B., & Zerning, H. (1997). Popcorn. Ahn & Simrock.

Cita Chicago (17th ed.)

Elton, Ben, i Heidi Zerning. Popcorn. München: Ahn & Simrock, 1997.

Cita MLA (8th ed.)

Elton, Ben, i Heidi Zerning. Popcorn. Ahn & Simrock, 1997.