Tohutoro APA (7th ed.)

(1985). Measuring the unmeasurable / editor-in-chief, Peter Nijkamp, co-editors, Helga Leitner, Neil Wrigley.

Tohutoru Kātū Chicago (17th ed.)

Measuring the Unmeasurable / Editor-in-chief, Peter Nijkamp, Co-editors, Helga Leitner, Neil Wrigley. 1985.

Tohutoro MLA (9th ed.)

Measuring the Unmeasurable / Editor-in-chief, Peter Nijkamp, Co-editors, Helga Leitner, Neil Wrigley. 1985.