APA (7th ed.) Citation

Virtama, P., & Helelä, T. (1969). Radiographic measurements of cortical bone: Variations in a normal population between 1 and 90 years of age, by Pekka Virtama and Tapio Helelä.

Chicago Style (17th ed.) Citation

Virtama, Pekka, and Tapio Helelä. Radiographic Measurements of Cortical Bone: Variations in a Normal Population Between 1 and 90 Years of Age, by Pekka Virtama and Tapio Helelä. Stockholm, 1969.

MLA (8th ed.) Citation

Virtama, Pekka, and Tapio Helelä. Radiographic Measurements of Cortical Bone: Variations in a Normal Population Between 1 and 90 Years of Age, by Pekka Virtama and Tapio Helelä. 1969.

Warning: These citations may not always be 100% accurate.