Gaya APA

Lao, K, N. (2004). The importance of improving watress ability to increase services in Purnama Hotel, Batu - Malang (Cetak) . Malang, Jatim: UNMER.

Gaya MLA

Lao, Kartini, Navrolita. "The importance of improving watress ability to increase services in Purnama Hotel, Batu - Malang (Cetak)". Malang, Jatim: UNMER, 2004. Text.