Παραπομπή σε μορφή APA (7η εκδ.)
Bureau of Mines, Geological Survey, & Krug, J. (1948). Mineral Resources of the United States: By the Staffs of the Bureau of Mines and Geological Survey. Foreword by J.A. Krug. Public Affairs Pr.
Παραπομπή σε μορφή Chicago (17η εκδ.)
Bureau of Mines, Geological Survey, και J.A Krug. Mineral Resources of the United States: By the Staffs of the Bureau of Mines and Geological Survey. Foreword by J.A. Krug. Washington: Public Affairs Pr, 1948.
Παραπομπή σε μορφή MLA (9th εκδ.)
Bureau of Mines, et al. Mineral Resources of the United States: By the Staffs of the Bureau of Mines and Geological Survey. Foreword by J.A. Krug. Public Affairs Pr, 1948.
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