Gaya APA
Purwana, W, T. (1970).
Sedjarah perkembangan perhotelan (introduction to hotel management, by G.W. Lattin) .
Jogjakarta:
Metromedia Avi.
Gaya MLA
Purwana, Wiweka, T..
"Sedjarah perkembangan perhotelan (introduction to hotel management, by G.W. Lattin)".
Jogjakarta:
Metromedia Avi,
1970.
BUKU.