APA (7th ed.) Citation

Oke, J., & Heller, J. (2003). Once upon a summer: Seasons of the heart (oke) series, book 1 (Unabridged.). Recorded Books Inc..

Chicago Style (17th ed.) Citation

Oke, Janette, and Johnny Heller. Once upon a Summer: Seasons of the Heart (oke) Series, Book 1. Unabridged. Prince Frederick: Recorded Books Inc., 2003.

MLA (8th ed.) Citation

Oke, Janette, and Johnny Heller. Once upon a Summer: Seasons of the Heart (oke) Series, Book 1. Unabridged. Recorded Books Inc., 2003.

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