Chai, F. C. (2007). Early picture postcards of North Borneo and Labuan. Opus Publications.
Citazione stile Chigago Style (17a edizione)Chai, Foh Chin. Early Picture Postcards of North Borneo and Labuan. Kota Kinabalu: Opus Publications, 2007.
Citatione MLA (9a ed.)Chai, Foh Chin. Early Picture Postcards of North Borneo and Labuan. Opus Publications, 2007.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.