APA Citation

Lewis, B. V., & Harrison, R. G. (1966). A presomite human embryo showing a yolk-sac duct.

Chicago Style Citation

Lewis, B V., and R G. Harrison. A Presomite Human Embryo Showing a Yolk-sac Duct. 1966.

MLA Citation

Lewis, B V., and R G. Harrison. A Presomite Human Embryo Showing a Yolk-sac Duct. 1966.

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