APA format:

Genetic Science Learning Center. (2014, July 10) Stem Cells. Retrieved March 24, 2019, from https://learn.genetics.utah.edu/content/stemcells/

CSE format:

Stem Cells [Internet]. Salt Lake City (UT): Genetic Science Learning Center; 2014 [cited 2019 Mar 24] Available from https://learn.genetics.utah.edu/content/stemcells/

Chicago format:

Genetic Science Learning Center. "Stem Cells." Learn.Genetics. July 10, 2014. Accessed March 24, 2019. https://learn.genetics.utah.edu/content/stemcells/.