Gaya APA

Shettles, L, B., rORVIK, D, M. (1970). How To Choose The SexOf Your Baby . New York: Anchor Books Doubleday.

Gaya MLA

Shettles, Landrum, B., rORVIK, DAVID, M. "How To Choose The SexOf Your Baby". New York: Anchor Books Doubleday, 1970. Text.