APA (7th ed.) Citation

Hendry, D., & Heap, S. (1999). Happy old birthday, Owl. Random House.

Chicago Style (17th ed.) Citation

Hendry, Diana, and Sue Heap. Happy Old Birthday, Owl. London: Random House, 1999.

MLA (9th ed.) Citation

Hendry, Diana, and Sue Heap. Happy Old Birthday, Owl. Random House, 1999.

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