Dyfyniad APA

Shapiro, R. (1987). Origin: A skeptic's giude to the creation of life on earth. New York: Bantam.

Dyfyniad Arddull Chicago

Shapiro, Robert. Origin: A Skeptic's Giude to the Creation of Life On Earth. New York: Bantam, 1987.

Dyfyniad MLA

Shapiro, Robert. Origin: A Skeptic's Giude to the Creation of Life On Earth. New York: Bantam, 1987.

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