APA-ийн эшлэл(7 дахь хэвлэлт)

Millichap, J. R. (2009). Robert Penn Warren after Audubon: The work of aging and the quest for transcendence in his later poetry. Louisiana State University Press.

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

Millichap, Joseph R. Robert Penn Warren After Audubon: The Work of Aging and the Quest for Transcendence in His Later Poetry. Baton Rouge: Louisiana State University Press, 2009.

MLA -ийн эшлэл (9 дэх хэвлэлт)

Millichap, Joseph R. Robert Penn Warren After Audubon: The Work of Aging and the Quest for Transcendence in His Later Poetry. Louisiana State University Press, 2009.