Booth, Verne H., author
Macmillan, 1969
Buku Teks
Swenson, Hugo N., author
John Wiley & Sons, 1957
Buku Teks
edited by Frank N. Magill
Salem Press, 1992
Buku Referensi
edited by Frank N. Magill
Salem Press, 1992
Buku Referensi
edited by Frank N. Magill
Salem Press, 1992
Buku Referensi