Cita APA (7a ed.)

Nguyen Khac Vien. (1968). The Year 1968: Chronology.

Cita Chicago Style (17a ed.)

Nguyen Khac Vien. The Year 1968: Chronology. Vietnam, 1968.

Cita MLA (9a ed.)

Nguyen Khac Vien. The Year 1968: Chronology. 1968.