Márquez quotation 

In The Fragrance of Guava, a collection of conversations between Gabriel García Márquez and Plinio Apuleyo Mendoza, first published in 1982, Márquez describes Neruda as "the greatest poet of the 20th century — in any language." That is the original source of that statement, which has been quoted, unsourced, by the Washington Post, by All Things Considered on NPR, and most recently, in the  New Directions paperback edition of Love Poems. But how exactly to cite that original source in a Wikipedia article, I will leave to established editors.