APA

Ewer J. . G., .A Course in Basic Scientific English: Students Book. U.S.A: Longman Group,1975: .

Chicago

Ewer J.R G.Latorre, .A Course in Basic Scientific English: Students Book. U.S.A: Longman Group,1975: .

Harvard

Ewer J. . G., .A Course in Basic Scientific English: Students Book. U.S.A: Longman Group,1975: .

MLA

Ewer J.R G.Latorre, .U.S.A: Longman Group,1975: . .