APA-ийн эшлэл(7 дахь хэвлэлт)

Royen, W. V. (1964). Fundamentals of economic geography: An introduction to the study of resources (5th ed.). Prentice-Hall.

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

Royen, William Van. Fundamentals of Economic Geography: An Introduction to the Study of Resources. 5th ed. Englewood Cliffs N.J.: Prentice-Hall, 1964.

MLA -ийн эшлэл (9 дэх хэвлэлт)

Royen, William Van. Fundamentals of Economic Geography: An Introduction to the Study of Resources. 5th ed. Prentice-Hall, 1964.