APA (7th ed.) Citation

Campbell, T. T., & Block, F. E. (1959). Europium and samarium reduction. Journal of Metals (1949), 11, 744.

Chicago Style (17th ed.) Citation

Campbell, T. T., and F. E. Block. "Europium and Samarium Reduction." Journal of Metals (1949) 11 (1959): 744.

MLA (9th ed.) Citation

Campbell, T. T., and F. E. Block. "Europium and Samarium Reduction." Journal of Metals (1949), vol. 11, 1959, p. 744.