World Vision, 2003
Buku Teks
Buku Teks
edited by John Fawcett
World Vision, 2003
Buku Teks
Lunn, Hugh Duncan
University of Queendsland Press, 1978
Buku Teks
edited by Alexander L. Eastman, David H. Rosenbaum, Erwin R. Thal
Mosby Elsevier, 2009
Buku Referensi