Baldwin, George B. (George Benedict), 1920-, author
John Hopkins Press, 1967
Buku Teks
Jacobs, Norman
Frederick A. Praeger, 1967
Buku Teks
Tinbergen, Jan, 1903-, author
McGraw-Hill, 1967
Buku Teks
Griffin, Keith B., author
Addison-Wesley, 1970
Buku Teks
edited by David F. Walker
John Wiley & Sons, 1980
Buku Teks