Gaya APA

Ragland, P, C., Rogers, J, J, W. (1984). Basalts . New York., London., Sydney: VAN NOSTRAND REINHOLD COMPANY.

Gaya MLA

Ragland, Paul, C.., Rogers, John, J., W.. "Basalts". New York., London., Sydney: VAN NOSTRAND REINHOLD COMPANY, 1984. Text.