Ingels, J. E. Landscaping: Principles & practices (7th ed.).
Cita Chicago (17th ed.)Ingels, Jack E. Landscaping: Principles & Practices. 7th ed.
Cita MLA (8th ed.)Ingels, Jack E. Landscaping: Principles & Practices. 7th ed.
Atenció: Aquestes cites poden no estar 100% correctes.