Bain, Barbara J.
Elsevier, 2017
Buku Teks SO
Hoffbrand, A. Victor
Wiley Blackwall, 2016
Buku Teks SO
Bush, Lewis
Tokyo News Service, Ltd., 1960
Buku Teks SO
Hodous, Lewis
Arthur Probstain, 1929
Buku Teks SO
Hanke, Lewis
D. Van Nostrand, 1959
Buku Teks SO