APA (7th ed.) Citation

Pyle, W. H. (1921). The psychology of learning: An advance text in educational psychology. [publisher not identified].

Chicago Style (17th ed.) Citation

Pyle, William Henry. The Psychology of Learning: An Advance Text in Educational Psychology. Baltimore, Warwick & York: [publisher not identified], 1921.

MLA (9th ed.) Citation

Pyle, William Henry. The Psychology of Learning: An Advance Text in Educational Psychology. [publisher not identified], 1921.