Gaya APA
Lai, K, S. (1981).
Essential elements of macro economics .
Singapura:
Pan pacific book Distribition (s) Pte Ltd.
Gaya MLA
Lai, Kwok, Seng.
"Essential elements of macro economics".
Singapura:
Pan pacific book Distribition (s) Pte Ltd,
1981.
Text.