APA

Foreign Service Institute U.S, Obolensky S., Sapountzis A. & Sapountzis P. (1967). Greek basic course. Washington: [For sale by the Supt. of Docs., U.S. Govt. Print. Off.].

Chicago

Foreign Service Institute U.S, Obolensky Serge, Sapountzis A and Sapountzis Panageotis. 1967. Greek basic course. Washington: [For sale by the Supt. of Docs., U.S. Govt. Print. Off.].

Harvard

Foreign Service Institute U.S, Obolensky S., Sapountzis A. and Sapountzis P. (1967). Greek basic course. Washington: [For sale by the Supt. of Docs., U.S. Govt. Print. Off.].

MLA

Foreign Service Institute U.S, Obolensky Serge, Sapountzis A and Sapountzis Panageotis. Greek basic course. Washington: [For sale by the Supt. of Docs., U.S. Govt. Print. Off.]. 1967.