APA (7th ed.) Citation

Howard, W. J. (1992). Doing simple math in your head. Coast Publishing.

Chicago Style (17th ed.) Citation

Howard, W. J. Doing Simple Math in Your Head. Coos Bay, Ore.: Coast Publishing, 1992.

MLA (9th ed.) Citation

Howard, W. J. Doing Simple Math in Your Head. Coast Publishing, 1992.