APA (7th ed.) Citation

Quain, d. (2011). Happy leap year! Wales publishing company.

Chicago Style (17th ed.) Citation

Quain, dr.bill. Happy Leap Year! New Jersey: Wales publishing company, 2011.

MLA (9th ed.) Citation

Quain, dr.bill. Happy Leap Year! Wales publishing company, 2011.

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