Dear Marise,
This book is one which should be bought by all Portuguese teaching institutions in Goa and certainly by Goa University. Perhaps if you get together with Instituoto Camoes it would be easier to procure. (By the way forgive my omission of Portuguese accents as I'm not too familiar with using these on a computer).
The publication details given in the book indicate that it is jointly published by Brigham Young University Studies, Provo, Utah; Camoes - Instituto de Coeperacao e da Linguas, I. P. Lisboa, Portugal; and Fundacao Casa de Macao, Fundacao Jorge Alvares Instituto Internacional de Macao, Lisbon, Portugal.
The price is not indicated. But perhaps if you corresponded with Prof Fred Williams
perhaps he will give it to you.