Gaya APA

Shelton, W, L, M, R, L. (1948). Survey Methods for Ecosystem Management . Amerika Serikat: John Wiley & Sons, Inc..

Gaya MLA

Shelton, Wane, L., Myers,, Ronald, L.. "Survey Methods for Ecosystem Management". Amerika Serikat: John Wiley & Sons, Inc., 1948. Text.