APA-ийн эшлэл(7 дахь хэвлэлт)

Norman Bridwell. (1997). Clifford's Spring Clean-Up (Clifford the Big Red Dog) (21st Printing.). Cartwheel.

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

Norman Bridwell. Clifford's Spring Clean-Up (Clifford the Big Red Dog). 21st Printing. Cartwheel, 1997.

MLA -ийн эшлэл (9 дэх хэвлэлт)

Norman Bridwell. Clifford's Spring Clean-Up (Clifford the Big Red Dog). 21st Printing. Cartwheel, 1997.