APA-ийн эшлэл(7 дахь хэвлэлт)

Denham, C., & Lieberman, A. (1980). Time to learn. U.S. Department of education.

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

Denham, Carolyn, ба Ann Lieberman. Time to Learn. California: U.S. Department of education, 1980.

MLA -ийн эшлэл (9 дэх хэвлэлт)

Denham, Carolyn, ба Ann Lieberman. Time to Learn. U.S. Department of education, 1980.