MLA

Robbins, Samuel Dowse, and Rosa Seymour Robbins. Correction of Speech Defects of Early Childhood. Boston, Mass.: Expression Company, 1937.

APA

Robbins, S. Dowse, & Robbins, R. Seymour. (1937). Correction of speech defects of early childhood. Boston, Mass.: Expression Company.

Chicago

Robbins, Samuel Dowse, and Rosa Seymour Robbins. Correction of Speech Defects of Early Childhood. Boston, Mass.: Expression Company, 1937.