APA (7th ed.) Citation

PLESSIS, N. D. (1970). An Introduction to Potential Theory. Hafner Publishing Company.

Chicago Style (17th ed.) Citation

PLESSIS, Nicolaas Du. An Introduction to Potential Theory. Hafner Publishing Company, 1970.

MLA (8th ed.) Citation

PLESSIS, Nicolaas Du. An Introduction to Potential Theory. Hafner Publishing Company, 1970.

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