Berlitz, Charles, author
Granada Publishing, 1977
Buku Teks
edited by James F. Lawrence
Academic Press, 1985
Buku Teks
edited by James F. Lawrence
Academic press, 1984
Buku Teks
edited by I.S. Krull
Elsevier, 1991
Buku Teks
Nestle Nutrition, 1986
Buku Teks