APA-ийн эшлэл(7 дахь хэвлэлт)

Kula, E. (1994). Economics of Natural Resources, the Environment and Policies (2nd. ed.). chapman & hall.

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

Kula, E. Economics of Natural Resources, the Environment and Policies. 2nd. ed. London: chapman & hall, 1994.

MLA -ийн эшлэл (9 дэх хэвлэлт)

Kula, E. Economics of Natural Resources, the Environment and Policies. 2nd. ed. chapman & hall, 1994.