APA-ийн эшлэл(7 дахь хэвлэлт)

Okun, B., & Richardson, R. W. (1961). Studies in economic development. Holt, Rinehart and Winston.

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

Okun, Bernard, ба Richard W. Richardson. Studies in Economic Development. New York: Holt, Rinehart and Winston, 1961.

MLA -ийн эшлэл (9 дэх хэвлэлт)

Okun, Bernard, ба Richard W. Richardson. Studies in Economic Development. Holt, Rinehart and Winston, 1961.