APA-viite

Elsworth, S., & Walker, E. (1986). Grammar practice for intermediate students.

Chicago-tyylinen lähdeviittaus

Elsworth, Steve, ja Elaine Walker. Grammar Practice for Intermediate Students. Hyderabad, Orient Longman, 1986.

MLA-viite

Elsworth, Steve, ja Elaine Walker. Grammar Practice for Intermediate Students. 1986.