Atkinson, Leslie D., author
Macmillan, 1985
Buku Teks
Campbell, Claire, author
Delmar , 1984
Buku Teks
Campbell, Claire, author
John Wiley & Sons, 1978
Buku Referensi
edited by Helen Yura, Mary B. Walsh
Appleton Century, 1983
Buku Teks
edited by Helen Yura, Marylin B. Walsh
Appletton-Lange , 1982
Buku Teks