Dyfyniad APA

ebrary, Inc, Aldridge, P. D., & Denis, J. H. (2009). Space exploration research. Nova Science Publishers.

Dyfyniad Arddull Chicago

ebrary, Inc, Paul D. Aldridge, and John H. Denis. Space Exploration Research. New York: Nova Science Publishers, 2009.

Dyfyniad MLA

ebrary, Inc, et al. Space Exploration Research. Nova Science Publishers, 2009.

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