Dyfyniad APA

Hammond, A. L., Metz, W. D., & Maugh, T. H. (1973). Energy and the future. American Association for the Advancement of Science.

Dyfyniad Arddull Chicago

Hammond, Allen L., William D. Metz, and Thomas H. Maugh. Energy and the Future. Washington: American Association for the Advancement of Science, 1973.

Dyfyniad MLA

Hammond, Allen L., et al. Energy and the Future. American Association for the Advancement of Science, 1973.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.