APA format:

Genetic Science Learning Center. (2015, January 7) Learn.Genetics. Retrieved January 19, 2018, from http://learn.genetics.utah.edu/

CSE format:

Learn.Genetics [Internet]. Salt Lake City (UT): Genetic Science Learning Center; 2015 [cited 2018 Jan 19] Available from http://learn.genetics.utah.edu/

Chicago format:

Genetic Science Learning Center. "Learn.Genetics." Learn.Genetics. January 7, 2015. Accessed January 19, 2018. http://learn.genetics.utah.edu/.