Donahue, R. L. (1977). Soils: An introduction to soils and plant growth. Englewood Cliffs, New Jersey: Prentice-Hall.
استشهاد بنمط شيكاغوDonahue, Roy L. Soils: An Introduction to Soils and Plant Growth. Englewood Cliffs, New Jersey: Prentice-Hall, 1977.
MLA استشهادDonahue, Roy L. Soils: An Introduction to Soils and Plant Growth. Englewood Cliffs, New Jersey: Prentice-Hall, 1977.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.