Parse, Rosemarie Rizzo, author
Hans Huber Publ., 1974
Buku Teks
Atkinson, Leslie D., author
Macmillan, 1985
Buku Teks
Campbell, Claire, author
Delmar , 1984
Buku Teks
Campbell, Claire, author
John Wiley & Sons, 1978
Buku Referensi
by E. Wight Bakke [and others]
John Wiley & Sons, 1954
Buku Teks