APA

National Endowment for the Humanities, . (1991). Summer seminars for school teachers: guidelines and application form for directors. Washington: The Endowment.

Chicago

National Endowment for the Humanities, . 1991. Summer seminars for school teachers: guidelines and application form for directors. Washington: The Endowment.

Harvard

National Endowment for the Humanities, . (1991). Summer seminars for school teachers: guidelines and application form for directors. Washington: The Endowment.

MLA

National Endowment for the Humanities, . Summer seminars for school teachers: guidelines and application form for directors. Washington: The Endowment. 1991.