APA
WILLERDING, . (1972). MATHEMATICS :THE ALPHABET OF SCIENCE. NEW YORK: JOHN WILEY AND SONS,INC.
Chicago
WILLERDING, . 1972. MATHEMATICS :THE ALPHABET OF SCIENCE. NEW YORK: JOHN WILEY AND SONS,INC.
Harvard
WILLERDING, . (1972). MATHEMATICS :THE ALPHABET OF SCIENCE. NEW YORK: JOHN WILEY AND SONS,INC.
MLA
WILLERDING, . MATHEMATICS :THE ALPHABET OF SCIENCE. NEW YORK: JOHN WILEY AND SONS,INC. 1972.