APA Баримт

Leavell U. W. (1961). Widening horizons: Teacher's guide book. American book company.

Чикаго маягийн жагсаалт

Leavell U. W. Widening Horizons: Teacher's Guide Book. New York: American book company, 1961.

MLA ишлэл

Leavell U. W. Widening Horizons: Teacher's Guide Book. American book company, 1961.