Trích dẫn APA

(2021). National geographic: Mysteries of a virus the kill us by the millions. But without them, life is impossible. Washington, DC: National Geographic Society.

Trích dẫn kiểu Chicago

National Geographic: Mysteries of a Virus the Kill Us By the Millions. But Without Them, Life Is Impossible. Washington, DC: National Geographic Society, 2021.

Trích dẫn MLA

National Geographic: Mysteries of a Virus the Kill Us By the Millions. But Without Them, Life Is Impossible. Washington, DC: National Geographic Society, 2021.

Cảnh báo: Các trích dẫn này có thể không phải lúc nào cũng chính xác 100%.