APA (7th ed.) Citation
Hejlesen, P. (1968). A preliminary Calibration of the Hertzsprung-Russell diagram in terms of mass and age for population I main-sequence stars of 1.0-1.6 solar masses.
Chicago Style (17th ed.) Citation
Hejlesen, P.M. A Preliminary Calibration of the Hertzsprung-Russell Diagram in Terms of Mass and Age for Population I Main-sequence Stars of 1.0-1.6 Solar Masses. 1968.
MLA (9th ed.) Citation
Hejlesen, P.M. A Preliminary Calibration of the Hertzsprung-Russell Diagram in Terms of Mass and Age for Population I Main-sequence Stars of 1.0-1.6 Solar Masses. 1968.
Warning: These citations may not always be 100% accurate.