APA
Wilson R. J., Watkins J. J., . (1990). Graphs. New York: John Wiley & Sons, Inc.
Chicago
Wilson Robin J, Watkins John J, . 1990. Graphs. New York: John Wiley & Sons, Inc.
Harvard
Wilson R. J., Watkins J. J., . (1990). Graphs. New York: John Wiley & Sons, Inc.
MLA
Wilson Robin J, Watkins John J, . Graphs. New York: John Wiley & Sons, Inc. 1990.