Franklin

MLA

Boice, Daniel Craig, Thomas A Hockey, and W. F Huebner. Comets In the 21st Century : a Personal Guide to Experiencing the Next Great Comet!. .

APA

Boice, D. Craig, Hockey, T. A., & Huebner, W. F. Comets in the 21st century : a personal guide to experiencing the next great comet!. .

Chicago

Boice, Daniel Craig, Thomas A. Hockey, and W. F Huebner. Comets In the 21st Century: A Personal Guide to Experiencing the Next Great Comet!.