Prof. Dardjowidjojo (and his estate after his passing in 2018) relied on royalties to fund linguistic research. Sharing pirated PDFs hurts the publishing ecosystem in Indonesia. UI-Press has struggled to produce updated editions because of rampant piracy.
: Some readers find the academic depth quite heavy, noting that it requires a baseline understanding of general linguistics to fully grasp.
Analysis on the Importance of Mother Tongue in Early Childhood
