The following format should be used when referencing books:
Surname, Initials. (Year) Title of article. Title of journal. Vol no (issue no), pp. page nos [Online]. Available from: website address. [Accessed date viewed].
Journal:
A journal is like a magazine as it comes in issues. For example the Radio Times is issued weekly. Journals have more of a professional or research focus than magazines.
O Eureka 620
O Machinery 620
O Electronics World 621
O Everyday Practical Electronics 621
When you use free information always check for accuracy and bias.
The Engineer is available free online. You can access it even after you have finished your course.