APA

authors s., . (1990). Great Endeavors. new york: macmillan publishing company.

Chicago

authors senior, . 1990. Great Endeavors. new york: macmillan publishing company.

Harvard

authors s., . (1990). Great Endeavors. new york: macmillan publishing company.

MLA

authors senior, . Great Endeavors. new york: macmillan publishing company. 1990.