MLA

Shchelkunov, S. N, et al. Orthopoxviruses Pathogenic for Humans. Springer US, 2005.

APA

Shchelkunov, S. N, Marennikova, S. S, Marennikova, S. S, Moyer, R. W, Moyer, R. W, & Shchelkunov, S. Nikolaevich. (2005). Orthopoxviruses Pathogenic for Humans. Springer US.

Chicago

Shchelkunov, S. N., S. S Marennikova, Svetlana S Marennikova, R. W Moyer, Richard W Moyer, and Sergei Nikolaevich Shchelkunov. Orthopoxviruses Pathogenic for Humans. : Springer US, 2005.