APA-viite (7. p.)

Birkland, J. L. H. (2019). Gerontechnology: Understanding older adult information and communication technology use. Emerald Publishing Limited.

Chicago-viite (17. p.)

Birkland, Johanna L. H. Gerontechnology: Understanding Older Adult Information and Communication Technology Use. Bingley, U.K.: Emerald Publishing Limited, 2019.

MLA-viite (9. p.)

Birkland, Johanna L. H. Gerontechnology: Understanding Older Adult Information and Communication Technology Use. Emerald Publishing Limited, 2019.