APA-viite (7. p.)

Lännergren, J. (1967). Mechanical activity of single twitch and slow muscle fibres of Xenopus Laevis. [s.n.].

Chicago-viite (17. p.)

Lännergren, Jan. Mechanical Activity of Single Twitch and Slow Muscle Fibres of Xenopus Laevis. Stockholm: [s.n.], 1967.

MLA-viite (8. p.)

Lännergren, Jan. Mechanical Activity of Single Twitch and Slow Muscle Fibres of Xenopus Laevis. [s.n.], 1967.