Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (8a ed.)

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