APA

United States, . (1972). Memorial addresses and other tributes in the Congress of the United States on the life and contributions of A. Willis Robertson. Washington: U.S. Govt. Print. Off.

Chicago

United States, . 1972. Memorial addresses and other tributes in the Congress of the United States on the life and contributions of A. Willis Robertson. Washington: U.S. Govt. Print. Off.

Harvard

United States, . (1972). Memorial addresses and other tributes in the Congress of the United States on the life and contributions of A. Willis Robertson. Washington: U.S. Govt. Print. Off.

MLA

United States, . Memorial addresses and other tributes in the Congress of the United States on the life and contributions of A. Willis Robertson. Washington: U.S. Govt. Print. Off. 1972.