APA (7th ed.) Citation

Polkowski, L. (2006). A Set Theory for Rough Sets. Toward A Formal Calculus of Vague Statements. Fundamenta Informaticae, 71(1), 49.

Chicago Style (17th ed.) Citation

Polkowski, Lech. "A Set Theory for Rough Sets. Toward A Formal Calculus of Vague Statements." Fundamenta Informaticae 71, no. 1 (2006): 49.

MLA (9th ed.) Citation

Polkowski, Lech. "A Set Theory for Rough Sets. Toward A Formal Calculus of Vague Statements." Fundamenta Informaticae, vol. 71, no. 1, 2006, p. 49.