Dyfyniad APA

Shapiro, R. (1986). Origins: A skeptic's guide the creation of life on the earth. London: Penguin Books.

Dyfyniad Arddull Chicago

Shapiro, Robert. Origins: A Skeptic's Guide the Creation of Life On the Earth. London: Penguin Books, 1986.

Dyfyniad MLA

Shapiro, Robert. Origins: A Skeptic's Guide the Creation of Life On the Earth. London: Penguin Books, 1986.

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