Principles of occupational therapy,
ed. by Helen S. Willard and Clare S. Spackman.

APA Citation

Willard, H. S., Spackman, C. S. (1947). Principles of occupational therapy. Philadelphia, [etc.]: Lippincott.

MLA Citation

Willard, Helen S, and Clare S Spackman. Principles of Occupational Therapy. Philadelphia, [etc.]: Lippincott, 1947.

Warning: These citations may not always be complete (especially for serials).