APA
Ang A.H.S, Tong W.H, . (1975). Probability Concepts in Engineering Planning Design. New York: John Wiley & Sons ,New York.
Chicago
Ang A.H.S, Tong W.H, . 1975. Probability Concepts in Engineering Planning Design. New York: John Wiley & Sons ,New York.
Harvard
Ang A.H.S, Tong W.H, . (1975). Probability Concepts in Engineering Planning Design. New York: John Wiley & Sons ,New York.
MLA
Ang A.H.S, Tong W.H, . Probability Concepts in Engineering Planning Design. New York: John Wiley & Sons ,New York. 1975.