• academic earth
• free libraries
• google scholar
• pubmed central
• learn anything
• vark questionnaire

mathematics

• tiger algebra

science

• chemical balancer
• drug info

business

• investopedia
• accounting coach

༺✧༻༺✧༻༺✧༻༺✧༻༺✧༻༺✧༻༺✧༻༺✧༻༺✧༻༺✧༻༺✧༻

for citations

• citation machine
• in-text citations: the basics

review of related literature

• pdfdrive
• global etd search
• theses.fr
• springer link
• ohiolink
• lib guides community
• doaj
• base
• eric
• infotopia
• google scholar
• refseek
• the virtual lrc
• sweetsearch
• deepdyve
• libgen
• project gutenberg