APA-ийн эшлэл(7 дахь хэвлэлт)

Wirtz Willard. (1975). The boundless resources: A prospectus for an education -work policy. NRPC.

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

Wirtz Willard. The Boundless Resources: A Prospectus for an Education -work Policy. Washington D.C.: NRPC, 1975.

MLA -ийн эшлэл (9 дэх хэвлэлт)

Wirtz Willard. The Boundless Resources: A Prospectus for an Education -work Policy. NRPC, 1975.