Johnson, Palmer O., author
Prentice-Hall, 1953
Buku Teks
Malinvaud, Edmond, author
North-Holland , 1980
Buku Teks
Goulden, Cyril H., author
John Wiley & Sons, 1952
Buku Teks
Hanushek, Eric A., author
Academic Press, 1977
Buku Teks
Fleiss, Joseph L., author
John Wiley & Sons, 1983
Buku Teks