APA-referens (7:e uppl.)

The Traditional land in Indonesia, exclusively in North Sumatra. between 1972 and 1974].

Chicago-referens (17:e uppl.)

The Traditional Land in Indonesia, Exclusively in North Sumatra. [n.p.: between 1972 and 1974].

MLA-referens (8:e uppl.)

The Traditional Land in Indonesia, Exclusively in North Sumatra. between 1972 and 1974].

Varning: dessa hänvisningar är inte alltid fullständigt riktiga.