APA (7th ed.) Citation

Smith, A. L., & Kidder, A. V. (1943). Explorations in the Motagua valley, Guatemala. [publisher not identified].

Chicago Style (17th ed.) Citation

Smith, A. Ledyard, and Alfred Vincent Kidder. Explorations in the Motagua Valley, Guatemala. Washington, D. C.: [publisher not identified], 1943.

MLA (8th ed.) Citation

Smith, A. Ledyard, and Alfred Vincent Kidder. Explorations in the Motagua Valley, Guatemala. [publisher not identified], 1943.