Trích dẫn APA

Gabrielle Walker. (2004). Snowball Earth: The story of the great global catastrophe that spawned life as we know it. Bloomsbury.

Trích dẫn kiểu Chicago

Gabrielle Walker. Snowball Earth: The Story of the Great Global Catastrophe That Spawned Life as We Know It. London: Bloomsbury, 2004.

Trích dẫn MLA

Gabrielle Walker. Snowball Earth: The Story of the Great Global Catastrophe That Spawned Life as We Know It. Bloomsbury, 2004.

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