APA-ийн эшлэл(7 дахь хэвлэлт)

CHRISTOPHERSON, R. W., & HOBBS, G. L. (1998). Applied physical geography geosystems in the laboratory.-- Ed.2. Prentice Hall.

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

CHRISTOPHERSON, Robert W., ба Gail Lewis HOBBS. Applied Physical Geography Geosystems in the Laboratory.-- Ed.2. New Jersey: Prentice Hall, 1998.

MLA -ийн эшлэл (9 дэх хэвлэлт)

CHRISTOPHERSON, Robert W., ба Gail Lewis HOBBS. Applied Physical Geography Geosystems in the Laboratory.-- Ed.2. Prentice Hall, 1998.