APA (7th ed.) Citation

Spriegel, W. R. (1957). Element of supervision. John Wiley Sons.

Chicago Style (17th ed.) Citation

Spriegel, William R. Element of Supervision. John Wiley Sons, 1957.

MLA (8th ed.) Citation

Spriegel, William R. Element of Supervision. John Wiley Sons, 1957.

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