APA (7th ed.) Citation

Seligman, E. R. A., & Johnson, A. S. (1930). Encyclopaedia of the social sciences. The Macmillan company.

Chicago Style (17th ed.) Citation

Seligman, Edwin R. A., and Alvin Saunders Johnson. Encyclopaedia of the Social Sciences. New York: The Macmillan company, 1930.

MLA (8th ed.) Citation

Seligman, Edwin R. A., and Alvin Saunders Johnson. Encyclopaedia of the Social Sciences. The Macmillan company, 1930.