APA(7版)引用形式

Malkin, B. (1980). Investment climate of Singapore. s.n.].

Chicagoスタイル(17版)引用形式

Malkin, Bruce. Investment Climate of Singapore. [Singapore: s.n.], 1980.

MLA(8版)引用形式

Malkin, Bruce. Investment Climate of Singapore. s.n.], 1980.