APA (7th ed.) Citation

Biesterveld, B., & Armstrong, G. D. (1973). Six days from Sunday. Rand McNally.

Chicago Style (17th ed.) Citation

Biesterveld, Betty, and George Douglas Armstrong. Six Days from Sunday. Chicago: Rand McNally, 1973.

MLA (9th ed.) Citation

Biesterveld, Betty, and George Douglas Armstrong. Six Days from Sunday. Rand McNally, 1973.