APA (7th ed.) Citation

Ledford, J. K. (1990). Exercises in refractometry. [SLACK, Inc.].

Chicago Style (17th ed.) Citation

Ledford, Janice K. Exercises in Refractometry. [Thorofare, N.J.]: [SLACK, Inc.], 1990.

MLA (9th ed.) Citation

Ledford, Janice K. Exercises in Refractometry. [SLACK, Inc.], 1990.