APA-ийн эшлэл(7 дахь хэвлэлт)

Edited by Estall, R. (1991). Global change and challenge: Geography for the 1990s. Routledge.

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

Edited by Estall, Robert. Global Change and Challenge: Geography for the 1990s. London: Routledge, 1991.

MLA -ийн эшлэл (9 дэх хэвлэлт)

Edited by Estall, Robert. Global Change and Challenge: Geography for the 1990s. Routledge, 1991.