Cita APA (7th ed.)

Walker, R. L. Urban sub-areas as sampling frameworks: A further development. Town Planning Review.

Cita Chicago (17th ed.)

Walker, Robert L. "Urban Sub-areas as Sampling Frameworks: A Further Development." Town Planning Review .

Cita MLA (9th ed.)

Walker, Robert L. "Urban Sub-areas as Sampling Frameworks: A Further Development." Town Planning Review, .