McGraw-Hill , 1996
Buku Teks
Baumgardt, John Philip
Timber Press, 1982
Buku Teks
[edited by] Robert S. Beardsley, Carole L. Kimberlin, William N. Tindall
Wolters Kluwer/Lippincott Williams & Wilkins, 2012
Buku Teks
Artikel Jurnal
Radlauer, Ruth, author
Bowmar, 1971
Buku Teks