APA (7th ed.) Citation

Martin, D. (2007). The 40th anniversary of "Populorum progressio". Origins, 37, 328-333.

Chicago Style (17th ed.) Citation

Martin, Diarmuid. "The 40th Anniversary of "Populorum Progressio"." Origins 37 (2007): 328-333.

MLA (9th ed.) Citation

Martin, Diarmuid. "The 40th Anniversary of "Populorum Progressio"." Origins, vol. 37, 2007, pp. 328-333.

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