APA
Buttenfield B. P., McMaster R. B. & Freeman H. (1991). Map generalization: making rules for knowledge representation. Harlow: Longman Scientific & Technical.
Chicago
Buttenfield Barbara Pfeil, McMaster Robert Brainerd and Freeman Herbert. 1991. Map generalization: making rules for knowledge representation. Harlow: Longman Scientific & Technical.
Harvard
Buttenfield B. P., McMaster R. B. and Freeman H. (1991). Map generalization: making rules for knowledge representation. Harlow: Longman Scientific & Technical.
MLA
Buttenfield Barbara Pfeil, McMaster Robert Brainerd and Freeman Herbert. Map generalization: making rules for knowledge representation. Harlow: Longman Scientific & Technical. 1991.