Gaya APA

Killough, H, B., W., I, K, L. (1960). International economics . New Jersey: New Jersey: D. Van Nostrand Company; 1960.

Gaya MLA

Killough, Hugh, B.., W., I., Killough,, Lucy. "International economics". New Jersey: New Jersey: D. Van Nostrand Company; 1960, 1960. Text.