APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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

Warning: These citations may not always be 100% accurate.