APA (7th ed.) Citation

Maestro, B., & Maestro, G. (1999). The story of clocks and calendars: Marking a millennium. Lothrop, Lee & Shepard.

Chicago Style (17th ed.) Citation

Maestro, Betsy, and Giulio Maestro. The Story of Clocks and Calendars: Marking a Millennium. New York: Lothrop, Lee & Shepard, 1999.

MLA (9th ed.) Citation

Maestro, Betsy, and Giulio Maestro. The Story of Clocks and Calendars: Marking a Millennium. Lothrop, Lee & Shepard, 1999.