APA-referens (7:e uppl.)

Lawry, J. (2006). Modelling and reasoning with vague concepts. Springer.

Chicago-referens (17:e uppl.)

Lawry, Jonathan. Modelling and Reasoning with Vague Concepts. Boston, MA: Springer, 2006.

MLA-referens (8:e uppl.)

Lawry, Jonathan. Modelling and Reasoning with Vague Concepts. Springer, 2006.