Artikel Jurnal
Mahathir bin Mohamad, 1925-, author
Pelanduk Publications, 1986
Buku Teks
Marisa Luisa Badenes, editor
[Springer, ], 2012
eBooks
Victor Arthur Rice...[et al.]
McGraw-Hill, 1957
Buku Teks
Welsh, James R., author
Robert E. Krieger, 1990
Buku Teks