Citing

Citing can be done in a variety of ways.

Literal citation (name (year) is an APA style citation):

"My favorite for years now has been pistachio ice cream", says Van Doorn (2016).

In own words:

According to Van Doorn (2016) pistachio ice cream is the best.

In more general wording:

Some people prefer pistachio ice cream (Van Doorn, 2016).

You can also leave out parts of citations with(...):

"My favorite (...) has been pistachio ice cream", says Van Doorn (2016).

Or add some explanation with []:

"My favorite for years now [since 2001] has been pistache-ijs", says Van Doorn (2016).

Tip: It is customary in writing to have one thought per paragraph. If this whole paragraph is based on the same source, it is sufficient to mention the source once in this paragraph. So you do not have to repeat the source every sentence. But try to remain clear as to what information comes from you and what from others!