Dyfyniad APA

ROBERTSON MARGARET. (2017). SUSTAINABILITY PRINCIPLES AND PRACTICE (2.). EARTHSCAN FROM ROUTLEDGE.

Dyfyniad Arddull Chicago

ROBERTSON MARGARET. SUSTAINABILITY PRINCIPLES AND PRACTICE. 2. EARTHSCAN FROM ROUTLEDGE, 2017.

Dyfyniad MLA

ROBERTSON MARGARET. SUSTAINABILITY PRINCIPLES AND PRACTICE. 2. EARTHSCAN FROM ROUTLEDGE, 2017.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.