Cita APA (7a ed.)

Huff, D. L. (1964). Defining and estimating a trading area. [s.n.].

Cita Chicago Style (17a ed.)

Huff, David L. Defining and Estimating a Trading Area. [S.l.]: [s.n.], 1964.

Cita MLA (9a ed.)

Huff, David L. Defining and Estimating a Trading Area. [s.n.], 1964.