APA (7th ed.) Citation

Jespersen, J., & Fitz-Randolph, J. (1977). From sundials to atomic clocks: Understanding time and frequency. US Government Printing Office.

Chicago Style (17th ed.) Citation

Jespersen, James, and Jane Fitz-Randolph. From Sundials to Atomic Clocks: Understanding Time and Frequency. Washington, DC: US Government Printing Office, 1977.

MLA (9th ed.) Citation

Jespersen, James, and Jane Fitz-Randolph. From Sundials to Atomic Clocks: Understanding Time and Frequency. US Government Printing Office, 1977.