APA (7th ed.) Citation

Swedberg, R. W., & Swedberg, H. (1989). American clocks and clockmakers. Wallace-Homestead.

Chicago Style (17th ed.) Citation

Swedberg, Robert W., and Harriett Swedberg. American Clocks and Clockmakers. Radvor, Pa: Wallace-Homestead, 1989.

MLA (9th ed.) Citation

Swedberg, Robert W., and Harriett Swedberg. American Clocks and Clockmakers. Wallace-Homestead, 1989.