By : http://fikri-muhammadrusdil.blogspot.co.id/2015/03/jurnal-praktikum-penurunan-titik-beku.html By : http://www.academia.edu/8053475/LAPORAN_PENENTUAN_TITIK_BEKU_LARUTANby : https://renideswantikimia.wordpress.com/kimia-kelas-xii-3/semester-i/1-sifat-koligatif-larutan/5-tekanan-osmosis/By : https://hatopikchem.wordpress.com/pbm-kimia/rumus-tekanan-osmotik-%CF%80-osmosis-larutan-hipertonik-isotonik-hipotonik-membran-semipermiabel-contoh-soal-praktikum/