APA (7th ed.) Citation

Helmholtz, H. v. (1962). Popular scientific lectures. Dover Publications,Inc.

Chicago Style (17th ed.) Citation

Helmholtz, Herman von. Popular Scientific Lectures. New York: Dover Publications,Inc, 1962.

MLA (9th ed.) Citation

Helmholtz, Herman von. Popular Scientific Lectures. Dover Publications,Inc, 1962.

Warning: These citations may not always be 100% accurate.