Cita APA (7a ed.)

JOHNSTON ROBERT B. (1998). TRADING SYSTEMS AND ELECTRONIC COMMERCE. ERUDITIONS PUB.

Cita Chicago Style (17a ed.)

JOHNSTON ROBERT B. TRADING SYSTEMS AND ELECTRONIC COMMERCE. AUSTRALIA: ERUDITIONS PUB, 1998.

Cita MLA (9a ed.)

JOHNSTON ROBERT B. TRADING SYSTEMS AND ELECTRONIC COMMERCE. ERUDITIONS PUB, 1998.