Gaya APA

PAGE, A. et al (1982). METHODS OF SOIL ANALYSIS PART 2 : CHEMICAL AND MICROBIOLOGICAL PROPERTIES SECOND EDITION . United States of America: MADISON.

Gaya MLA

PAGE, AL.. et al. "METHODS OF SOIL ANALYSIS PART 2 : CHEMICAL AND MICROBIOLOGICAL PROPERTIES SECOND EDITION". United States of America: MADISON, 1982. Text.