“harf”, in[EKSS] Eesti keele seletav sõnaraamat [Descriptive Dictionary of the Estonian Language] (in Estonian) (online version), Tallinn: Eesti Keele Sihtasutus (Estonian Language Foundation),2009
“harf”, in[ÕS]Eesti õigekeelsussõnaraamat ÕS 2018 [Estonian Spelling Dictionary] (in Estonian) (online version), Tallinn: Eesti Keele Sihtasutus (Estonian Language Foundation),2018,→ISBN
Henrik Liljegren, Naseem Haider (2011) “harf”, inPalula Vocabulary (FLI Language and Culture Series; 7)[1], Islamabad, Pakistan: Forum for Language Initiatives,→ISBN
1929 January 1, “Vakit (1929) senesinin saadet verici olmasını diler”, inVakit[2], page 1:
Kânunusani. Nihayet kânunusaniye giriyoruz; yaniharf inkılâbının en mühim tatbik devrine başlıyoruz; irfan aleminde yeni bir hayatın eşiğine ayak atıyoruz.
January. We are finally entering January; that is, we are starting the most important application period of theletter (alphabet) revolution; we are stepping the threshold of a new life in the world of wisdom.