APA

Haub C., Torrey B. B., .A comparison of US and canadian mortality in 1998. : .

Chicago

Haub C, Torrey B B, .A comparison of US and canadian mortality in 1998. : .

Harvard

Haub C., Torrey B. B., .A comparison of US and canadian mortality in 1998. : .

MLA

Haub C, Torrey B B, .: . .