Cita APA

Whitten, C. A., & Whitten, C. A. (1947). Air-line distances between cities in the United States. Washington: GPO.

Citación estilo Chicago

Whitten, C. A., y C. A. Whitten. Air-line Distances between Cities in the United States. Washington: GPO, 1947.

Cita MLA

Whitten, C. A., y C. A. Whitten. Air-line Distances between Cities in the United States. Washington: GPO, 1947.