Rae, John B., author
McGraw-Hill, 1949
Buku Teks
Mason, Edward S., author
Claremont College for the four associated colleges at Claremont, 1955
Buku Teks
Stebbins, Richard P.
Harper & Brothers, 1955
Buku Teks
Lary, Hal B.
National Beureau of Economic, 1963
Buku Teks
Stebbins, Richard P.
Harper & Brothers, 1960
Buku Teks