A closed life-support system for space colonies

MLA

Johnson, R. D., et al. A Closed Life-Support System for Space Colonies. July 1977. EBSCOhost, widgets.ebscohost.com/prod/customlink/proxify/proxify.php?count=1&encode=0&proxy=&find_1=&replace_1=&target=https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&scope=site&db=edsnas&AN=edsnas.19770064007&authtype=sso&custid=ns315887.

APA

Johnson, R. D., Jebens, H. J., & Sweet, H. C. (1977). A closed life-support system for space colonies.

Chicago

Johnson, R. D, H. J Jebens, and H. C Sweet. 1977. “A Closed Life-Support System for Space Colonies,” July. http://widgets.ebscohost.com/prod/customlink/proxify/proxify.php?count=1&encode=0&proxy=&find_1=&replace_1=&target=https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&scope=site&db=edsnas&AN=edsnas.19770064007&authtype=sso&custid=ns315887.