Manullang, Laurence A.
Salemba Empat, 2013
Buku Teks
M. Faried Ali
Rajawali, 2011
Buku Teks
edited by David Rees, Richard McBain
Kencana Prenada Media Group, 2007
Buku Teks
Hicks, Herbert G.
McGraw-Hill, 1976
Buku Teks SO
Caspari, John A.
John Wiley & Sons, 2004
Buku Teks