Gaya APA

LANGI, F, F, G., NAJOAN, J, A. (2009). Barriers to delivery care by skilled attendants in north Sulawesi . : F.Kedokteran Universitas Sebelas Maret.

Gaya MLA

LANGI, F.L., Fredrik, G.., NAJOAN, Johannis, A.. "Barriers to delivery care by skilled attendants in north Sulawesi". : F.Kedokteran Universitas Sebelas Maret, 2009. Artikel.